A metallic sphere of radius `21 cm` is dropped into a cylindrical vessel, which is partly, filled with water. The diameter of the vessel is `1.68 m.` If the sphere is completely submerged, find by how much the surface of water will rise.

Explanation

To solve the problem of how much the surface of water will rise when a metallic sphere is submerged in a cylindrical vessel, we can follow these steps:

### Step 1: Find the volume of the sphere
The formula for the volume \( V \) of a sphere is given by:

\[ V = \frac{4}{3} \pi r^3 \]
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